Bake-oven illuminator.



F.J.ALBREGHT. BAKE OVEN ILLUMINATOR.

APPLICATION FILED MAB. 2, 1912. v 1,048,0'24- Patented 1360.24, 1912.

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F. J. ALBREGHT.

BAKE OVEN ILLUMINATOR.

APP'LIUATION FILED MAR. 2, 1912.

1,048,024. 4 Patented Dec. 24,1912.

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UNITED FRANCIS J. ALBREGHT, or PITTSBURGH, PENNSYLVANIA.

BAKE-OVEN ILLUMINATOR.

To all whom it mag/concern:

Be it known that'I, FRANCIS J. ALBRECHT, residing at Pittsburgh7 in the county of Allegheny and State of Pennsylvania, fa citizen of the United States, have'invented or discovered certain fnew, and useful vImprovements in Bake-Oven Illuminators, of which improvement the following is a speciication.

In United States yLetters Patent, No.

' 858,132, granted'to me June 25, 1907, I

have shown certain improvements in the construction of bake oven doors and illuminators. 'y f My present invention relates to such a construction, and has particularly to do with the illuminator. l i

'y Briefly stated, the illuminator, shown in myabove named patent, consists ofa gas Vlamp placed in front of a reflector andV fwithin a compartment separated by an iron wall from the bake oven proper. Anopen ing in the said wall and in front of the lamp is closed by translucent material, such as mica; and, to protect the'mica from becoming coated or otherwise injured by the oven gases, a hinged door coversthe opening, and

*is provided with a lever to operate it and hold it in open posit-ion when desired. kThe lever is also effective, when operating the door, to open and close a valve inthe gas pipe. ,i

It has been found that, in the actual use of the illuminator above described, the hinged door does not, even when in. closed position, form an adequate protection for` the (mica closure. `And furthermore, it has been found that the workman, after closing the oven door frequently neglects to close the hinged illuminator door, witlrthe result that the mica is soon rendered opaque,

and the gas light is needlessly burned.

The object of my present invention is to provide an illuminator, which will be etlicient and easily operated, and in which the above stated undesirable features of my earlier illuminator will beeliminated.

My invention is illustrated in the accompanying drawings, `which form part of my specification, and in which'- Y Figure 1 is an elevation of the front of ay bake" oven, showing the oven door, and at opposite sides thereof a pyrometer and an illuminator; Fig. 2 isa sectional view taken through the illuminator on the line II-II, Fig. 1; Fig. 3 is a sectionalview taken onl Specification of Letters Patent.

i y Patented Dec. 24, 1912. Application led March 2, 1912. Serial No. 681,203. v y' j the line- III-IIL Fig. 2; and Fig. 4 is Sectio-nal view similar to Fig. 2, but showi ing the use of electric lights rather than gas lamps as a source of illumination.

In the several figures like numerals are used to designate like parts.

Referring particularly to Fig.v 1, the ver# tically movable oven door 1 may be vvopened i by means of the hand lever 2, substantially` inthe same manner as described in my afore-y ysaid patent.r At the right side of the door 1 a pyrometer 3 maybe placed; and at the" left of the said door, or invany other suitable place,an illuminator compartment 4 may be provided. IIhe illuminator compartment 4, which may be of any desired form, may be separated fromthe ovenby a wall 5, preferably of cast-iron. Within the said compartment 4 a suitable sourceof light, such as gas lamps 6, may be provided; anda reflector 7 may be suitably placed to y the rear thereof. In front of the lights 6, the wall 5 ris provided with a suitable opening 8 ypreferably located some distance above the floor ofthe oven. To the end thatthe said opening/may be constantly kept closed, and that the closure may, when desirable,

be translucent, and to the further end that the translucent closure may not be Hrendered opaque, I preferably form a single movable closure, one portion of which consists of a translucent body.k And I so construct the closure that in its range of movement, the translucent portion thereof may,`v` when not in operative'use, be entirely within the illuminating chamber,` and therefore not,

exposed tothe oven gases.k As particularly illustrated in Figs. 2 and 3, the closure 9 preferably consists ofa cylindrically shaped shell, having a mica closed opening 10`in the lower part thereof; andL the closure is preferably pivotally mounted on the walls 11 and 12 as at 13 and 14 respectively. 4It will be understood of this construction that the rim of the opening 8 is shapedto corre-4 wardly, and the translucent portion there-A of will be brought to register with the opening 8. And the said handle 15 may be vprof.

vided, with a notch 17, adapted to be engaged by an abutment or wall portion 18 y icc iio

when the closure has been shifted. Furthermore, the said handle may be provided with a pin 19, adapted to operatively engage a forked lever 20, operatively connected to the gas-controlling valve 21. The movements of the closure 9 may be limited by a suitable abutment 22s formed on the wall 5 adjacent to the opening 8, and in such a position as to engage, in the alter- 'nate positions of the closure 9, the upper and lower edges of the mica-provided o-pening 10.

To the end that the closure 9 may not be held in its upward position when the oven door is closed, I preferably provide a trip lever 23, pivoted as at 24:, and I provide the oven door 1 with a lug 25, the entire arrangement being such that, when the door 1 is closed, the lug 25 will engage the lever 23 and cause it to release the handle 15 from its engagement by the abutment 18, so that the closure may fall, preferablyl of its own weight. And in order to relieve the fall of the closure I preferably provide a counter balancing spring 26, as shown.

In Fig. I I have shown an illuminator construction similar in most respects to that shown in Figs. 2 and 3 and described above, but different therefrom in that the source of illumination is an incandescentlamp 6a. In this construction the forked lever 2Oa is curved so as to openand close t-he switch 27 as the arm 15a is moved to its alternate positions.

The operation of my improved illumr nator is apparent from the foregoing description and from the drawings. Nhen the oven door is closed, the closure will be in the position indicated in full lines in Fig. 2. When it is desirable to look into the oven, the door 1 may be opened, and the handle 15 may be thrust inwardly and in such position the closure will be in the position indicated by dotted lines in Fig. 2, the translucent portion thereof covering the opening 8 in the wall 5, and when the door is closed the lever 23 will be tripped so that the closure will, as described above, fall to the full line position.

I claim herein as my invention:

1. The combination with an oven, of an illuminator compartment mounted adjacent thereto, a wall between the oven and the compartment and provided with an opening above the oven floor, a light in substantial horizontal alinement with the said opening, and a vertically slidable closure for said opening, the lower portion of said closure being formed of translucent material, located below the level of said light when the oven is not illuminated.

2. The combination with an oven having a movable door, and an illuminator compartment separated from said oven by a wall having an opening therethrough, of a closure for said opening, and means for holding said closure in light transmitting position, said holding means being rendered ine'ective on and by the closing of the o-ven door.

3. rl`he combination with an oven having a movable door, and an illuminator compartment separated from said oven by a wall having an opening therethrough, of a curved pivotally mounted closure for said opening provided with an area of trans! lucent material, a notched arm pivotally secured to the lower portion of said closure and effective when thrust inwardly to move said closure and by its notched engagement with an abutment to hold said closure in moved position, a trip lever mounted adjacent to said arm, and a lug on said oven door effective to engage and move the said lever when the door is closing.

In testimony whereof I have hereunto set my hand.

FRANCIS J. ALBRE CI-IT Witnesses:

PAUL N. CRlfroI-ILOW, FRANCIS J ToMAssoN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

